Congress president Sonia Gandhi, who did not campaign in the assembly elections in five states, including Uttar Pradesh, will also give the counting on Saturday a miss as she has flown abroad for treatment.
Party sources said she left for abroad on Wednesday night for a "routine medical check-up", and will return only after Holi on Monday.
Though they did not let in on where Gandhi has gone for the check-up, there was speculation that she was in the US where she had undergone treatment for an undisclosed ailment.
Gandhi, who has not been keeping well for quite some time, held a closed-door meeting with senior party leaders and her deputy Rahul Gandhi before her departure. Rahul, Congress vice president, will discharge the functions of the party president in her absence.
Rahul, tipped to succeed her over time, spearheaded Congress' election campaign in the five states of Uttar Pradesh, Uttarakhand, Punjab, Goa and Manipur.
Sonia Gandhi has largely been out of action after having taken ill during a roadshow in Varanasi, Prime Minister Narendra Modi's constituency, on 2 August.
She was flown to the national capital and admitted to the Army's Research and Referral Hospital before being shifted to Sir Ganga Ram Hospital. Gandhi was again admitted to Sir Ganga Ram Hospital in November for viral fever and discharged after a few days.